Robert Charles Imperial 3 Flute Countersink 100° - 1.1/4 Head Diameter

The Robert Charles Imperial 3 Flute Countersink is manufactured for accurate and efficient countersinking of imperial sized holes, delivering a clean and consistent chamfer finish.

The 3-flute design provides smooth cutting action, improved stability, and reduced chatter, helping to produce high-quality results across a variety of materials including steel, aluminium, and plastics. Built for durability and reliable performance, this countersink is well suited for workshop, maintenance, and production machining applications where precision and surface finish are important.

• Three-flute geometry: Delivers a smooth cutting action, improved stability, and reduced chatter—helping you achieve clean, consistent chamfers across steel, aluminium, and plastics.
• 100° countersink angle: Creates the required chamfer for imperial-sized holes, ensuring reliable fastener seating and a high-quality edge finish.
• 1-1/4 in head diameter: Provides a robust, deeper countersink with better chip clearance and stable performance across a range of materials and thicknesses.

With the Robert Charles Imperial 3 Flute Countersink, you gain precise, repeatable chamfers that improve fastener seating and edge quality, helping you finish parts faster with less rework. The tool’s durable build and stable cutting action reduce vibration and chatter, supporting reliable performance through busy workshop days, maintenance tasks, and small-to-medium production runs. In short, it delivers consistent results you can trust across steel, aluminium, and plastics.